Lightning protection performance analysis method for graphite grounding device of power transmission line tower

Abstract

The invention relates to a lightning protection performance analysis method for a graphite grounding device of a power transmission line tower, and the method comprises the following steps: (1), analyzing the structure of the tower grounding device according to the grounding data of the power transmission line, changing a round steel grounding material into a graphene material, and building a grounding grid model through an SESCAD module of CDEGS simulation software; (2) introducing the soil model, calculating the power frequency grounding resistance by using an MALZ module, comparing the power frequency grounding resistance with the grounding resistance of the original round steel grounding model, and judging whether the grounding resistance of the graphite grounding device meets the standard or not; (3) aiming at the tower top lightning stroke mode, adopting ATP-EMTP software simulation to establish a line and tower model, and analyzing the influence on the lightning resistance levelunder the graphite grounding condition; and (4) modifying the lightning current amplitude for multiple times as required, and performing simulation calculation for multiple times until the lightningresistance level is obtained. According to the method, the grounding resistance can be effectively reduced, the lightning resistance level is improved, and a basis is provided for design, popularization and application of the graphene grounding device.

Description

technical field [0001] The invention relates to the technical field of lightning protection for transmission line pole tower grounding devices, in particular to a lightning protection performance analysis method for transmission line pole tower grounding devices. Background technique [0002] my country's transmission lines are mainly overhead lines, and towers support the conductors and ground wires of overhead transmission lines. The grounding device is an important part of the tower. The grounding device ensures that the lightning current leaks into the ground when the tower is struck by lightning. It can be said that grounding is the foundation of lightning protection. If there is no grounding, it will not be possible to discharge the current quickly, and the system will be damaged or even paralyzed. [0003] At present, my country's grounding devices are laid with metal materials such as steel and copper to form horizontal or vertical grounding electrodes. Due to th...

AI Technical Summary

Problems solved by technology

In recent years, graphene grounding devices have developed rapidly and have been applied on a large scale in power transmission networks, but the main application is that graphene materials have strong corrosion resistance for alkaline soils, and their electrical conductivity, especially impact current The research on withstand characteristics and other aspects is far from enough, and the research on the lightning protection characteristics of graphene grounding devices based on different earth conductivity scenarios is still in a blank state

Images